Originally Posted by monogodo
Yes, they did make one. My early '90s Croce d'Aune cranks came with one.
Third option down is small chainring for Campy 9/10 speed, and first option when you click on it is 39T.
I found it by searching Google for "Campagnolo 39T 10 speed chainring."
....LOL.. $75 for a campy 39! A generic 39 in a 135 BCD will work as well.